19999952

素因数分解:

$2^4\times 7^1\times {\mathrm{178571}}^1$

素因数の和:178586

約数の個数: 20

約数和(自身を含む): 44285856

約数和(自身を除く): 24285904

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 178571, 357142, 714284, 1249997, 1428568, 2499994, 2857136, 4999988, 9999976, 19999952]

約数ペア:

[(1, 19999952), (2, 9999976), (4, 4999988), (7, 2857136), (8, 2499994), (14, 1428568), (16, 1249997), (28, 714284), (56, 357142), (112, 178571)]